2 replies to this topic

[JoeWong]

Dear sir,
Will you please explain the difference between shut down valve & shut off valve & mention
their working principle.
Please mention the area of application of both the valves.
Thanks

Done see big differences between them...i guess

Shutdown valve - proper isolation in case of emergency...read more on 12 Features required for Shutdown Valve (SDV)
Shut-off valve - operational on-off valve ?! Could be same as SDV.

Please provides entire wording or complete sentences to understand the context behind these words...

[Anthony87]

They are probably the same thing.
The way you've worded it though, I'd assume a shut down valve is something that, when opened or closed, will effectively shut down something - eg a globe valve or a butterfly valve on a feed line.
A shut off valve would likely be triggered by an alarm and shut-off a flow in or out from part of your plant.
http://en.wikipedia....i/Shutoff_valve
http://en.wikipedia...._Shutdown_Valve